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Cisco IPv6 Tutorial by Hinwoto
1.
IPv6 Lab and
Techtorial Hinwoto htjun@cisco.com © 2009 Cisco Systems, Inc. All rights reserved. Cisco Public 1
2.
Agenda (Lecture)
IPv6 Addressing IPv6 Neighbor Discovery IPv6 Configuration on Hosts and Routers IPv6 Static Routing IPv6 OSPFv3 IPv6 BGP IPv6 Deployment Techniques TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 2
3.
Agenda (Labs)
Lab1: IPv6 Addressing Lab2: IPv6 Neighbor Discovery Lab3: IPv6 Static Routing Lab4: IPv6 OSPFv3 Lab5: IPv6 BGP Lab6: IPv6 Tunneling (Manual) *Bonus* TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 3
4.
Prerequisites for this
Session A network engineer Or wannabe network engineer Love Cisco Not Customer Service Officer, Not Account Manager, Not Spy, Not etc….. Have Own Laptop ☺ TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 4
5.
IPv6 Technology TECRST-2300 14448_04_2008_c1
© 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 5
6.
IPv4 and IPv6
Header Comparison IPv4 Header IPv6 Header Type of Version Traffic Class Flow Label Version IHL Total Length Service Fragment Payload Length Next Header Hop Limit Identification Flags Offset Time to Live Protocol Header Checksum Source Address Source Address Destination Address Options Padding Legend Destination Address – Field Name Kept from IPv4 to IPv6 – Fields not Kept in IPv6 – Name and Position Changed in IPv6 – New Field in IPv6 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 6
7.
IPv6 Addressing TECRST-2300 14448_04_2008_c1
© 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 7
8.
IPv6 Addressing TECRST-2300 14448_04_2008_c1
© 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 8
9.
IPv6 Addressing TECRST-2300 14448_04_2008_c1
© 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 9
10.
Addressing Format
Representation 16-bit hexadecimal numbers Numbers are separated by (:) Hex numbers are not case sensitive Abbreviations are possible Leading zeros in contiguous block could be represented by (::) Example: 2001:0db8:0000:130F:0000:0000:087C:140B 2001:0db8:0:130F::87C:140B Double colon only appears once in the address TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 10
11.
Addressing
Prefix Representation Representation of prefix is just like CIDR In this representation you attach the prefix length Like v4 address: 198.10.0.0/16 V6 address is represented the same way: 2001:db8:12::/48 Only leading zeros are omitted. Trailing zeros are not omitted. 2001:0db8:0012::/48 = 2001:db8:12::/48 2001:db8:1200::/48 ≠ 2001:db8:12::/48 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 11
12.
IPv6 Address Representation
Loopback address representation 0:0:0:0:0:0:0:1=> ::1 Same as 127.0.0.1 in IPv4 Identifies self Unspecified address representation 0:0:0:0:0:0:0:0=> :: Used as a placeholder when no address available (Initial DHCP request, Duplicate Address Detection, DAD) TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 12
13.
IPv6—Addressing Model
Addresses are assigned to interfaces Change from IPv4 mode Interface “expected” to have multiple addresses Addresses have scope Link local Unique local Global Unique Local Link Local Global Addresses have lifetime Valid and preferred lifetime TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 13
14.
Addressing
Some Special Addresses Type Binary Hex Aggregatable Global 001 2 or 3 Unicast Address Link-Local 1111 1110 10 FE80::/10 Unicast Address FC00::/7 Unique Local 1111 1100 FC00::/8(Registry) Unicast Address 1111 1101 FD00::/8 (No Registry) Multicast Address 1111 1111 FF00::/8 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 14
15.
Types of IPv6
Addresses Unicast Address of a single interface. One-to-one delivery to single interface. Multicast Address of a set of interfaces. One-to-many delivery to all interfaces in the set. Anycast Address of a set of interfaces. One-to-one-of-many delivery to a single interface in the set that is closest. No more broadcast addresses TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 15
16.
Aggregatable Global Unicast
Addresses Provider Site Host 3 45 Bits 16 Bits 64 Bits Global Routing Prefix SLA Interface ID 001 Aggregatable Global Unicast Addresses Are: Addresses for generic use of IPv6 Structured as a hierarchy to keep the aggregation TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 16
17.
Unique-Local
128 Bits Global ID 40 Bits Interface ID 1111 110 Subnet ID FC00::/7 16 Bits 7 Bits Unique-Local Addresses Used for: Local communications Inter-site VPNs Not routable on the Internet TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 17
18.
Link-Local
128 Bits Remaining 54 Bits Interface ID 1111 1110 10 FE80::/10 10 Bits Link-Local Addresses Used for: Mandatory address for communication between two IPv6 device (like ARP but at layer 3) Automatically assigned by router as soon as IPv6 is enabled Also used for next-hop calculation in routing protocols Only link-specific scope Remaining 54 bits could be zero or any manual configured value TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 18
19.
IPv6 Address Allocation
Process Partition of Allocated IPv6 Address Space TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 19
20.
IPv6 Address Allocation
Process Partition of Allocated IPv6 Address Space (Cont.) Lowest-order 64-bit field of unicast address may be assigned in several different ways: –Auto-configured from a 64- bit EUI-64, or expanded from a 48-bit MAC address (e.g., Ethernet address) –Autogenerated pseudo-random number (to address privacy concerns) –Assigned via DHCP –Manually configured TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 20
21.
IPv6 Interface Identifier
Cisco uses the EUI-64 format to do stateless 00 90 27 17 FC 0F auto-configuration This format expands the 00 90 27 17 FC 0F 48-bit MAC address to 64 bits FF FE by inserting FFFE into the middle 16 bits 00 90 27 FF FE 17 FC 0F To make sure that the 1 = Unique chosen address is from 000000U0 Where U= a unique Ethernet MAC 0 = Not Unique address, the universal/ U=1 local (“u” bit) is set to 1 02 90 27 FF FE 17 FC 0F for global scope and 0 for local scope TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 21
22.
ICMPv6 and
Neighbor Discovery TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 22
23.
ICMPv6
Internet Control Message Protocol version 6 RFC 2463 Modification of ICMP from IPv4 Message types are similar (but different types/codes) Destination unreachable (type 1) Packet too big (type 2) Time exceeded (type 3) Parameter problem (type 4) Echo request/reply (type 128 and 129) TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 23
24.
Neighbor Discovery
Replaces ARP, ICMP (redirects, router discovery) Reachability of neighbors Hosts use it to discover routers, auto configuration of addresses Duplicate Address Detection (DAD) TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 24
25.
Neighbor Discovery
Neighbor discovery uses ICMPv6 messages, originated from node on link local with hop limit of 255 Consists of IPv6 header, ICMPv6 header, neighbor discovery header, and neighbor discovery options Five neighbor discovery messages 1. Router solicitation (ICMPv6 type 133) 2. Router advertisement (ICMPv6 type 134) 3. Neighbor solicitation (ICMPv6 type 135) 4. Neighbor advertisement (ICMPv6 type 136) 5. Redirect (ICMPV6 type 137) TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 25
26.
Router Solicitation and
Advertisement 1. RS 2. RA 1—ICMP Type = 133 (RS) 2—ICMP Type = 134 (RA) Src = link-local address (FE80::1/10) Src = link-local address (FE80::2/10) Dst = all-routers multicast address Dst = all-nodes multicast address (FF02::1) (FF02::2) Data = options, subnet prefix, lifetime, Query = please send RA autoconfig flag Router Solicitations (RS) are sent by booting nodes to request RAs for configuring the interfaces Routers send periodic Router Advertisements (RA) to the all-nodes multicast address TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 26
27.
Neighbor Solicitation and
Advertisement A B Neighbor Solicitation ICMP type = 135 Src = A Dst = Solicited-node multicast of B Data = link-layer address of A Query = what is your link address? Neighbor Advertisement ICMP type = 136 Src = B Dst = A Data = link-layer address of B A and B Can Now Exchange Packets on this Link TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 27
28.
Autoconfiguration
Mac Address: 00:2c:04:00:FE:56 Host Autoconfigured Sends Network-Type Address Is: Information Prefix Received + (Prefix, Default Route, …) Link-Layer Address Larger Address Space Enables: The use of link-layer addresses inside the address space Autoconfiguration with “no collisions” Offers “plug-and-play” TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 28
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Renumbering
Mac Address: 00:2c:04:00:FE:56 Host Autoconfigured Sends New Network-Type Address Is: Information New Prefix Received (Prefix, Default Route, …) + Link-Layer Address Data = Two Prefixes: Current Prefix (to Be Deprecated), with Short Lifetimes New Prefix (to Be Used), with Normal Lifetimes Larger Address Space Enables: Renumbering, using autoconfiguration and multiple addresses TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 29
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Renumbering (Cont.)
Router Configuration after Renumbering: interface Ethernet0 ipv6 nd prefix 2001:db8:c18:1::/64 43200 0 ipv6 nd prefix 2001:db8:c18:2::/64 43200 43200 or: interface Ethernet0 ipv6 nd prefix 2001:db8:c18:1::/64 at Jul 31 2008 23:59 Jul 20 2008 23:59 ipv6 nd prefix 2001:db8:c18:2::/64 43200 43200 New Network Prefix: 2001:db8:c18:2::/64 Deprecated Prefix: 2001:db8:c18:1::/64 Router Advertisements Host Configuration: deprecated address 2001:db8:c18:1:260:8ff:fede:8fbe Autoconfiguring preferred address 2001:db8:c18:2:260:8ff:fede:8fbe IPv6 Hosts TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 30
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Configuring IPv6 TECRST-2300 14448_04_2008_c1
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IOS IPv6 Addressing
Examples (1) Manual Interface Identifier Fast0/0 ipv6 unicast-routing ! interface FastEthernet0/0 ip address 10.151.1.1 255.255.255.0 ip pim sparse-mode duplex auto speed auto ipv6 address 2006:1::1/64 ipv6 enable ipv6 nd ra-interval 30 ipv6 nd prefix 2006:1::/64 300 300 ! TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 32
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IOS IPv6 Addressing
Examples (1) Manual Interface Identifier r1#sh ipv6 int fast0/0 FastEthernet0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::207:50FF:FE5E:9460 Global unicast address(es): 2006:1::1, subnet is 2006:1::/64 Joined group address(es): FF02::1 FF02::2 FF02::1:FF00:1 FF02::1:FF5E:9460 MAC Address : 0007.505e.9460 MTU is 1500 bytes ICMP error messages limited to one every 100 milliseconds ICMP redirects are enabled r1#sh int fast0/0 ND DAD is enabled, number of DAD attempts: 1 ND reachable timeis up, line milliseconds FastEthernet0/0 is 30000 protocol is up ND advertised reachable time is 0007.505e.9460 (bia 0007.505e.9460) Hardware is AmdFE, address is 0 milliseconds ND advertised retransmit interval is 0 milliseconds ND router advertisements are sent every 30 seconds ND router advertisements live for 1800 seconds Hosts use stateless autoconfig for addresses. r1# TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 33
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IOS IPv6 Addressing
Examples (2) EUI-64 Interface Identifier Fast0/0 ipv6 unicast-routing ! interface FastEthernet0/0 ip address 10.151.1.1 255.255.255.0 ip pim sparse-mode duplex auto speed auto ipv6 address 2006:1::/64 eui-64 ipv6 enable ipv6 nd ra-interval 30 ipv6 nd prefix 2006:1::/64 300 300 ! TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 34
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IOS IPv6 Addressing
Examples (2) EUI-64 Interface Identifier r1#sh ipv6 int fast0/0 FastEthernet0/0 is up, line protocol is up IPv6 is enabled, link-local address is FE80::207:50FF:FE5E:9460 Global unicast address(es): 2006:1::207:50FF:FE5E:9460, subnet is 2006:1::/64 Joined group address(es): FF02::1 MAC Address : 0007.505e.9460 FF02::2 FF02::1:FF5E:9460 MTU is 1500 bytes ICMP error messages limited to one every 100 milliseconds r1#sh int fast0/0 ICMP redirects are enabled FastEthernet0/0 is up, line protocol is up ND DAD is enabled, number of DAD attempts: 1 ND reachable is AmdFE, 30000 milliseconds Hardware time is address is 0007.505e.9460 (bia 0007.505e.9460) ND advertised reachable time is 0 milliseconds ND advertised retransmit interval is 0 milliseconds ND router advertisements are sent every 30 seconds ND router advertisements live for 1800 seconds Hosts use stateless autoconfig for addresses. r1# TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 35
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Configuring IPv6
on Hosts TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 36
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Microsoft (Windows) TECRST-2300 14448_04_2008_c1
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Client Configuration (Windows
XP): Dual-Stack Required Microsoft Windows XP (SP1 or higher) Microsoft Windows Server 2003 Windows Dual-Stack XP Client Router IPv6 must be installed C:>ipv6 install Have network (routers/switches) configured for IPv6 Stateless autoconfiguration and/or DHCPv6 C:>ipconfig Windows IP Configuration Ethernet adapter Local Area Connection 1: Connection-specific DNS Suffix . : IP Address. . . . . . . . . . . . : 10.1.1.100 Subnet Mask . . . . . . . . . . . : 255.255.255.0 IP Address. . . . . . . . . . . . : 2001:DB8:C003:1122:203:ffff:fe81:d6da IP Address. . . . . . . . . . . . : fe80::203:ffff:fe81:d6da%4 Default Gateway . . . . . . . . . : 10.1.1.1 fe80::201:42ff:fe2d:9580 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 38
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IPv6 Access Lists TECRST-2300 14448_04_2008_c1
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IPv6 Access-List Example
Filtering outgoing traffic from site-local source addresses 2001:0db8:c18:2::/64 IPv6 Internet fc00:0:0:2::/64 ipv6 access-list blocksite deny fc00:0:0:2::/64 any ipv6 access-list blocksite permit any any Ethernet0 interface Ethernet0 ipv6 traffic-filter blocksite out Global Prefix: 2001:0db8:c18:2::/64 Unique-Local Prefix: fc00:0:0:2::/64 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 40
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Routing in IPv6 TECRST-2300 14448_04_2008_c1
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Routing in IPv6
As in IPv4, IPv6 has two families of routing protocols: IGP and EGP, and still uses the longest-prefix match routing algorithm IGP RIPng (RFC 2080) Cisco EIGRP for IPv6 Integrated IS-ISv6 (draft-ietf-isis-ipv6-07) OSPFv3 (RFC 2740)—(draft-ietf-ospf-ospfv3-update-19) EGP: MP-BGP4 (RFC 2858 and RFC 2545) Cisco IOS supports all of them Pick one that meets your objectives TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 42
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IPv6 Default and
Static Routing TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 43
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Default and Static
Routing Similar to IPv4. Need to define the next hop/interface. Default route denoted as ::/0 ipv6 route ipv6-prefix/prefix-length {ipv6-address | interface-type interface-number [ipv6-address]} [administrative-distance] [administrative-multicast-distance | unicast | multicast] [tag tag] Examples: Forward packets for network 2001:DB8::0/32 through 2001:DB8:1:1::1 with an administrative distance of 10 Router(config)# ipv6 route 2001:DB8::0/32 2001:DB8:1:1::1 10 Default route to 2001:DB8:1:1::1 Router(config)# ipv6 route ::/0 2001:DB8:1:1::1 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 44
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OSPFv3 (RFC 2740) TECRST-2300 14448_04_2008_c1
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OSPFv3 Configuration Example Router1# interface
POS1/1 ipv6 address 2001:410:FFFF:1::1/64 ipv6 enable ipv6 ospf 100 area 0 Area 1 Router2 interface POS2/0 ipv6 address 2001:B00:FFFF:1::2/64 2001:b00:ffff:1::1/64 POS3/0 ipv6 enable ipv6 ospf 100 area 1 2001:b00:ffff:1::2/64 POS2/0 ipv6 router ospf 100 router-id 10.1.1.3 Router1 Router2# POS1/1 interface POS3/0 ipv6 address 2001:B00:FFFF:1::1/64 2001:410:ffff:1::1/64 ipv6 enable ipv6 ospf 100 area 1 ipv6 router ospf 100 Area 0 router-id 10.1.1.4 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 46
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OSPFv3 Show Commands Router2#sh
ipv6 ospf int pos 3/0 POS3/0 is up, line protocol is up Link Local Address FE80::290:86FF:FE5D:A000, Interface ID 7 Area 1, Process ID 100, Instance ID 0, Router ID 10.1.1.4 Network Type POINT_TO_POINT, Cost: 1 Transmit Delay is 1 sec, State POINT_TO_POINT, Timer intervals configured, Hello 10, Dead 40, Wait 40, Retransmit 5 Hello due in 00:00:02 Index 1/1/1, flood queue length 0 Next 0x0(0)/0x0(0)/0x0(0) Last flood scan length is 3, maximum is 3 Last flood scan time is 0 msec, maximum is 0 msec Neighbor Count is 1, Adjacent neighbor count is 1 Adjacent with neighbor 10.1.1.3 Suppress hello for 0 neighbor(s) TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 47
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OSPFv3 Show Commands Router2#sh
ipv6 ospf neighbor detail Neighbor 10.1.1.3 In the area 1 via interface POS3/0 Neighbor: interface-id 8, link-local address FE80::2D0:FFFF:FE60:DFFF Neighbor priority is 1, State is FULL, 12 state changes Options is 0x630C34B9 Dead timer due in 00:00:33 Neighbor is up for 00:49:32 Index 1/1/1, retransmission queue length 0, number of retransmission 1 First 0x0(0)/0x0(0)/0x0(0) Next 0x0(0)/0x0(0)/0x0(0) Last retransmission scan length is 2, maximum is 2 Last retransmission scan time is 0 msec, maximum is 0 msec TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 48
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OSPFv3 Show Commands Router2#sh
ipv6 route IPv6 Routing Table - 5 entries Codes: C - Connected, L - Local, S - Static, R - RIP, B - BGP U - Per-user Static route I1 - ISIS L1, I2 - ISIS L2, IA - ISIS interarea O - OSPF intra, OI - OSPF inter, OE1 - OSPF ext 1, OE2 - OSPF ext 2 OI 2001:410:FFFF:1::/64 [110/2] via FE80::2D0:FFFF:FE60:DFFF, POS3/0 C 2001:B00:FFFF:1::/64 [0/0] via ::, POS3/0 L 2001:B00:FFFF:1::1/128 [0/0] via ::, POS3/0 L FE80::/10 [0/0] via ::, Null0 L FF00::/8 [0/0] via ::, Null0 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 49
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BGP-4 Extensions
for IPv6 (RFC 2545) TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 50
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BGP-4 Configurations for
IPv6 Non-Link-Local Peering network 2003:3:2::/64 network 2003:3:3::/64 Router A AS 1 A :1 router bgp 1 no bgp default ipv4 unicast bgp router-id 1.1.1.1 neighbor 2006:b00:ffff:2::2 remote-as 2 2006:b00:ffff:2/64 address-family ipv6 neighbor 2006:b00:ffff:2::2 activate :2 network 2003:3:2::/64 network 2003:3:3::/64 AS 2 B TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 51
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BGP-4 for IPv6
« Show Command » RouterA#show bgp ipv6 2001:100:1:1::/64 BGP routing table entry for 2001:100:1:1::/64, version 71 Paths: (2 available, best #2, table default) Advertised to update-groups: 1 100 2001:100:1:1::1 (FE80::A8BB:CCFF:FE01:F600) from FE80::A8BB:CCFF:FE01:F600%Ethernet0/0 (200.11.11.1) Origin incomplete, metric 0, localpref 100, valid, external Local :: from 0.0.0.0 (200.14.14.1) Origin incomplete, metric 0, localpref 100, weight 32768, valid, sourced, best TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 52
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Deployment TECRST-2300 14448_04_2008_c1
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IPv4-IPv6 Transition/Coexistence
A wide range of techniques have been identified and implemented, basically falling into three categories: 1. Dual-stack techniques, to allow IPv4 and IPv6 to co-exist in the same devices and networks 2. Tunneling techniques, to avoid order dependencies when upgrading hosts, routers, or regions 3. Translation techniques, to allow IPv6-only devices to communicate with IPv4-only devices Expect all of these to be used, in combination TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 54
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Host-Running Dual Stack
www.a.com =*? IPv4 2001:db8::1 10.1.1.1 DNS IPv6 Server 2001:db8::1 In a Dual-Stack Case, an Application that: Is IPv4 and IPv6-enabled Asks the DNS for all types of addresses Chooses one address and, for example, connects to the IPv6 address TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 55
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Cisco IOS Dual-Stack
Configuration router# ipv6 unicast-routing Dual-Stack interface Ethernet0 Router ip address 192.168.99.1 255.255.255.0 ipv6 address 2001:db8:213:1::/64 eui-64 IPv6 and IPv4 Network IPv4: 192.168.99.1 IPv6: 2001:db8:213:1::/64 eui-64 Cisco IOS® Is IPv6-Enable: If IPv4 and IPv6 are configured on one interface, the router is dual-stacked Telnet, ping, traceroute, SSH, DNS client, TFTP, etc. TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 56
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Tunneling TECRST-2300 14448_04_2008_c1
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Tunneling
Many Ways to Do Tunneling Some ideas same as before GRE, MPLS, IP Native IP over data link layers ATM PVC, dWDM Lambda, Frame Relay PVC, serial, Sonet/SDH, Ethernet Some new techniques Automatic tunnels using IPv4, compatible IPv6 address, 6to4, ISATAP TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 58
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Manually-Configured GRE Tunnel
Dual-Stack Dual-Stack Router1 Router2 IPv4 IPv6 IPv6 Network Network IPv4: 192.168.99.1 IPv4: 192.168.30.1 IPv6: 2001:db8:800:1::3 IPv6: 2001:db8:800:1::2 router1# router2# interface Tunnel0 interface Tunnel0 ipv6 enable ipv6 enable ipv6 address 2001:db8:c18:1::3/128 ipv6 address 2001:db8:c18:1::2/128 tunnel source 192.168.99.1 tunnel source 192.168.30.1 tunnel destination 192.168.30.1 tunnel destination 192.168.99.1 tunnel mode gre ipv6 tunnel mode gre ipv6 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 59
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Manually-Configured IPv6 over
IPv4 Tunnel Dual-Stack Dual-Stack Router1 Router2 IPv4 IPv6 IPv6 Network Network IPv4: 192.168.99.1 IPv4: 192.168.30.1 IPv6: 2001:db8:800:1::3 IPv6: 2001:db8:800:1::2 router1# router2# interface Tunnel0 interface Tunnel0 ipv6 enable ipv6 enable ipv6 address 2001:db8:c18:1::3/127 ipv6 address 2001:db8:c18:1::2/127 tunnel source 192.168.99.1 tunnel source 192.168.30.1 tunnel destination 192.168.30.1 tunnel destination 192.168.99.1 tunnel mode ipv6ip tunnel mode ipv6ip TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 60
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Labs TECRST-2300 14448_04_2008_c1
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Network Diagram—IPv6 Lab
Sample Topology for a Single Pod Network A Network B F0/0 E0/0 S1/0 S1/1 S1/1 H2 H1 R2 R3 R4 R1 S1/0 S1/0 S1/0 E0/0 F0/0 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 62
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All Routers/Hosts Basic
Configuration Configure the Following on Your Router and Host: For example: R1 and H1 hostname R1 / H1 ! no ip domain-lookup ! line con 0 no login exec-timeout 0 0 privilege level 15 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 63
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Lab 1: IPv6
Addressing TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 64
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Lab 1: Task
Summary Enable IPv6 on all four routers (R1 to R4) Configure hosts (H1 and H2) to use stateless address auto-configuration for IPv6 Configure IPv6 addresses on Ethernet and serial interfaces using addresses listed in Table 1 Use show commands to view IPv6 configuration and addresses Use ping to verify IPv6 connectivity TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 65
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Lab 1: Configuring
IPv6 Interfaces (1) Table 1: IPv6 Prefixes for Ethernet and Serial Interfaces Router Unique-Local Global IPv6 Prefix Number IPv6 Prefix R1 (S1/0) 2001:DB8:1122:12::1/64 fc00:1:2:12::1/64 R1 (F0/0) 2001:DB8:1234:1::/64 eui-64 R2 (S1/0) 2001:DB8:1122:12::2/64 fc00:1:2:12::2/64 R2 (S1/1) 2004:DB8:2233:23::2/64 R3 (S1/1) 2001:DB8:3344:34::3/64 fc00:3:4:34::3/64 R3 (S1/0) 2004:DB8:2233:23::3/64 R4 (F0/0) 2001:DB8:1234:4::/64 eui-64 R4 (S1/0) 2001:DB8:3344:34::4/64 fc00:3:4:34::4/64 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 66
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Lab 1: Configuring
IPv6 Interfaces (2) Task: Configuring the IPv6 Ethernet Interface On routers R1 and R2, go to global configuration mode #configure terminal Enable IPv6 unicast routing on the router (config)#ipv6 unicast-routing Configure the f0/0 interface (config)#interface f0/0 Enable IPv6 on the interface (config-if)#ipv6 enable (config-if)#no shutdown Quit the configure mode (config-if)#end Verify that the Ethernet interface is configured #show ipv6 interface f0/0 Identify the type of addresses that are configured TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 67
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Lab 1: Configuring
IPv6 Interfaces (3) Task: Finding the Link-Local Address of a Host On hosts H1 and H2, go to global configuration mode #configure terminal Configure the host F0/0 interface (config)#interface F0/0 Enable IPv6 on the interface (config-if)#ipv6 enable (config-if)#ipv6 address autoconfig (config-if)#no shutdown Quit the configure mode (config-if)#end Verify that the interface is configured #show ipv6 interface F0/0 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 68
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Lab 1: Configuring
IPv6 Interfaces (4) Task: Verifying IPv6 Link-Local Connectivity On routers R1 and R4, enable console debugging of ICMP and Neighbor Discovery (ND) IPv6 packets #debug ipv6 icmp #debug ipv6 nd On the router, ping the local Ethernet interface of host specifying the link-local address in the ping command destination address #ping fe80::<link local address of Host> #ping ipv6 fe80::<link local address of Host> On the router, verify the list of IPv6 neighbors #show ipv6 neighbors TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 69
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Lab 1: Configuring
IPv6 Interfaces (5) Task: Configuring a Static IPv6 Address with EUI-64 On routers R1 and R4, configure a global IPv6 address on f0/0 interface using the /64 prefix of your subnet and the EUI-64 format Subnet = router number, e.g., R1 = 2001:DB8:1234:1::/64 & R2 = 2001:DB8:1234:2::/64) #configure terminal (config)#interface f0/0 (config-if)#ipv6 address 2001:DB8:1234:<router #>::/64 eui-64 (config)#end Verify the configuration On the routers, disable all console debugging #undebug all TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 70
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Lab 1: Configuring
IPv6 Interfaces (6) Task: Configuring IPv6 addresses on Ethernet1/0 and Serial2/0 Interfaces On all four routers, configure a global and unique-local address on other interfaces by using the IPv6 prefix assigned. Use the router number for the host part. (Refer to table 1 for details) For example, on R1: #configure terminal (config)#interface f0/1 (config-if)#ipv6 enable (config-if)#ipv6 address fc00:1:2:12::<router #>/64 (config-if)#ipv6 address 2001:DB8:1122:12::<router #>/64 (config-if)#no shutdown Verify connectivity by using ping to next-hop router #ping <global or unique-local address of next-hop router> #show ipv6 neighbors TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 71
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Lab 2: Using
Neighbor Discovery TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 72
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Lab 2: Task
Summary Enable Router Advertisements (RA) for global and unique-local IPv6 prefixes on f0/0 (R1 and R2) Use show commands and debugs (debug ipv6 nd) to view IPv6 configuration Use ping to verify IPv6 connectivity Renumber the E0/0 interfaces on R1 and R2 by deprecating the old IPv6 prefixes and announcing a new IPv6 prefix Pick a new IPv6 global prefix (2003:DB8:ffff:<router #>::/64) Deprecate the old prefix; hint: change the valid and preferred lifetimes TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 73
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Lab 2: Using
Neighbor Discovery (1) Task: Configuring Router Advertisements for Global Addresses Look at the configuration of hosts H1 and H2 and determine if they have received a global address? #show ipv6 interface F0/0 Enable the debugging mode for IPv6 Neighbor Discovery (ND) #debug ipv6 nd On routers R1 and R4, go to configuration mode and then under Ethernet 0/0 interface #configure terminal (config)#interface f0/0 Enable RAs by using the ND command with the subnet prefix assigned to your LAN. Because infinite lifetime is not desired, use five minutes (120 seconds) for lifetime (both preferred and valid). (config-if)#ipv6 nd prefix 2001:DB8:1234:<router #>::/64 120 120 Verify that the hosts now have an IPv6 address that was automatically configured with this subnet prefix. Note that the previously configured link-local address is still present and valid. Also look at the valid and preferred lifetimes, are they decrementing? #show ipv6 interface f0/0 Verify connectivity using the ping command on the router to the host using the newly assigned address of the host as the ping destination #ping <global address of Host> TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 74
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Lab 2: Using
Neighbor Discovery (2) Task: Configuring Router Advertisements for Unique-Local Addresses Configure a unique-local address on f0/0 interface of Routers R1 and R4 by using the subnet prefix for your LAN. Use EUI-64 format. #configure terminal (config)#interface f0/0 (config-if)#ipv6 address fc00:0:0:<router #>::/64 eui-64 Enable RAs by using the ND command with subnet prefix assigned to your LAN for unique-local addresses. Use five minutes (120 seconds) for the lifetime. (config-if)# ipv6 nd prefix fc00:0:0:<router #>::/64 120 120 Change the RA interval to 30 seconds (config-if)# ipv6 nd ra interval 30 Verify that hosts H1 and H2 now have an IPv6 address configured with this subnet prefix #show ipv6 interface f0/0 Verify connectivity to the host using the ping command on the router to the host using the newly assigned address of the host as the ping destination address #ping <unique-local address of Host> TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 75
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Lab 2: Using
Neighbor Discovery (3) Task: Renumbering the Local Network on the Router On routers R1 and R2, configure the new address of workgroup f0/0 interface by using the new global subnet prefix assigned to your LAN. Use EUI-64 format. #configure terminal (config)#interface f0/0 (config-if)#ipv6 address 2003:DB8:ffff:<router #>::/64 eui-64 Enable RAs by using the ND command with the new subnet prefix assigned to your LAN. Use five minutes (240 seconds) for the lifetime. (config-if)# ipv6 nd prefix 2003:DB8:ffff:<router #>::/64 240 240 Verify that hosts H1 and H2 have a new address with the new prefix #show ipv6 interface ethernet0/0 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 76
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Lab 2: Using
Neighbor Discovery (4) Modify the Neighbor Advertisement (NAs) for 2001:DB8:1234:<router #>::/64 (the old prefix) by making the valid and preferred lifetimes equal to 60 and 0 respectively #configure terminal (config)#interface ethernet0/0 (config-if)# ipv6 nd prefix 2001:DB8:1234:<router #>::/64 20 0 Verify that the hosts deprecate the use of the “old” prefix and prefers the “new” one #show ipv6 interface ethernet0/0 Verify connectivity to the host by using the ping command on the router using the new assigned address of host #ping <new global address of Host> #undebug all TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 77
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Lab 3: IPv6
Static Routing TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 78
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Lab 3: Task
Summary Configure IPv6 default static routes on R1 and R4 Configure IPv6 static routes on R3 and R4 Use ping to verify IPv6 connectivity between R1 and R4 Use show commands to view IPv6 routing table TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 79
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Lab 3: IPv6
Static Routing (1) Task: Configuring IPv6 Static Routing on Routers Configure static default routes on R1 and R4 pointing to R2 and R3 respectively (see table 1 for addressing details) On R1: (config)#ipv6 route ::/0 2001:DB8:1122:12::2 On R4: (config)#ipv6 route ::/0 2001:DB8:3344:34::3 Configure static routes on R2 pointing to R4’s E1/0 network; R3 pointing to R1’s E1/0 network. (see table 1 for addressing details) On R2: (config)#ipv6 route 2001:DB8:3344:34::/64 2004:DB8:2233:23::3 On R3: (config)#ipv6 route 2001:DB8:1122:12::/64 2004:DB8:2233:23::2 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 80
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Lab 3: IPv6
Static Routing (2) Task: Verifying IPv6 Connectivity Using Static Routes Verify the routing table #show ipv6 route Verify IPv6 connectivity using the ping command using the peer’s IPv6 address #ping <your peer’s Global IPv6 Address> Can you ping from R1 to R4 and vice versa? If not, troubleshoot why the ping is not working. Hint: use “debug ipv6 icmp” and “debug ipv6 packet” on R2 and R3 to see if traffic is being forwarded TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 81
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Lab 4: Routing
with OSPFv3 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 82
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Lab 4: Task
Summary Enable debugs for IPv6 routing and IPv6 OSPFv3 #debug ipv6 routing #debug ipv6 ospf event Configure OSPFv3 on all four routers Look at topology diagram for details Use 192.168.30.xx for router-id (where xx is the router number) Remove all IPv6 static and default routes on all routers Use ping to verify IPv6 connectivity between H1 and H2 Use show commands to view IPv6 routing table #show ipv6 route #show ipv6 ospf neighbor #show ipv6 ospf database Answer review questions at the end of this section TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 83
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OSPFv3 Configuration Example
Network A Network B F0/0 E0/0 S1/0 S1/1 S1/1 H2 H1 R2 R3 R4 R1 S1/0 S1/0 S1/0 E0/0 F0/0 Area 10 Area 0 Area 20 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 84
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Lab 4: Routing
with OSPFv3 (1) Task: Configuring OSPFv3 Enable the debugging mode for IPv6 routing and IPv6 OSPFv3 #debug ipv6 routing #debug ipv6 ospf event Configure an OSPFv3 process 1 on the routers with a router-ID (config)#ipv6 router ospf 1 (config-rtr)#router-id 192.168.30.xx (where xx is your router #) Enable OSPFv3 on each interface on all four routers For example on R1: (config)#interface ethernet0/0 (config-if)#ipv6 ospf 1 area 10 (config-if)#interface ethernet1/0 (config-if)#ipv6 ospf 1 area 10 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 85
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OSPFv3 Configuration—Router R1
(2) Router R1 ipv6 unicast-routing interface Ethernet0/0 no ip address ipv6 ospf 1 area 10 interface Ethernet1/0 no ip address ipv6 ospf 1 area 10 ipv6 router ospf 1 router-id 192.168.30.1 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 86
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OSPFv3 Configuration—Router R2
(3) Router R2 ipv6 unicast-routing interface Ethernet1/0 no ip address ipv6 ospf 1 area 10 interface Serial2/0 no ip address ipv6 ospf 1 area 0 ipv6 router ospf 1 router-id 192.168.30.2 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 87
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Lab 4: Routing
with OSPFv3 (4) Task: Configuring OSPFv3 Verify that the routing table is updated by entries coming from the other workgroup routers, OSPFv3 Neighbor, OSPFv3 database #show ipv6 route #show ipv6 ospf neighbor #show ipv6 ospf database Do you see the OSPFv3 routes in the routing table on R2 and R3? Why or why not? Remove the static routes on all 4 routers #no ipv6 route <network> <next hop> Verify IPv6 connectivity using the ping command on Host. Use the remote host’s global IPv6 address as the destination address of the ping command #ping <Global IPv6 address of the remote host> #undebug all On R4 define a loopback4 with address 2040::4/64 and do a redistribute connected under ipv6 router ospf. Check the database of R1 and R2 with show ipv6 ospf database external. Do you see the loopback address? On R1 and R2 under ipv6 router ospf configure “area 10 stub”. Do you see the external routes now? Why not? TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 88
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Lab 5: Routing
with BGP TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 89
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Lab 5: Task
Summary Enable debugging for BGP #debug bgp ipv6 unicast Configure BGP AS number and router-id on all four routers using table 2 Activate iBGP peering between R1 and R2 and R3 and R4 using the interface global IPv6 address. Announce the global prefix and unique-local prefix. Activate eBGP peering between R2 and R3 using their global IPv6 addresses On R2 and R3, filter the unique-local prefix (fc00::/10) so that you do not receive them from the peers Use show commands to view the BGP configuration #show bgp ipv6 unicast summary #show bgp ipv6 unicast neighbors <IP address> advertised-routes #show bgp ipv6 unicast neighbors <IP address> routes #show ipv6 route bgp Use show bgp ipv6 unicast to see the routes in the BGP table Answer review questions at the end of this section TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 90
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BGP Configuration Example
iBGP iBGP Network A Network B F0/0 E0/0 S1/0 S1/1 S1/1 H2 H1 R2 R3 R4 R1 S1/0 S1/0 S1/0 E0/0 F0/0 AS 65012 EBGP AS 65034 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 91
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Lab 5: Routing
with BGP (1) Task: Configuring BGP Refer to table 2 for the router address and autonomous system (AS) number Enable the debugging of BGP #debug bgp ipv6 Define your router as a BGP router with your AS number (config)#router bgp <AS number> Because IPv4 has not been configured yet and BGP protocol uses the IPv4 address as an identifier, a specific command to identify the router-id is needed. Use table 2 to find the router-id. Then configure the router BGP router-id. (config-router)#bgp router-id <your router-id> Deactivate the IPv4 default peering (config-router)#no bgp default ipv4-unicast TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 92
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Lab 5: Routing
with BGP (2) Table 2: Assigned AS Number and Router ID Router Number AS Number Router ID R1 65012 192.168.60.1 R2 65012 192.168.60.2 R3 65034 192.168.60.3 R4 65034 192.168.60.4 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 93
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Lab 5: Routing
with BGP (3) Activate iBGP peering between R1 and R2 and R3 and R4 using the Ethernet 1/0 global IPv6 address. Announce your global prefix and your unique-local prefix. (config-router)#neighbor <peer’s S1/0 global IPv6 address > remote-as <AS number> (config-router)#neighbor <peer’s S1/0 global IPv6 address > update-source S1/0 (config-router)#address-family ipv6 (config-router-af)#neighbor <peer’s S1/0 global IPv6 address> activate (config-router-af)#network <F0/0 global network prefix>/64 R1 and R4 (config-router-af)#network <S1/0 unique local prefix>/64 only (config-router-af)#exit Look at the BGP routing table to determine if you received BGP routes from your neighbor #show bgp ipv6 unicast summary #show bgp ipv6 unicast neighbors <IP address> advertised-routes #show bgp ipv6 unicast neighbors <IP address> routes #show ipv6 route bgp TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 94
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Lab 5: Routing
with BGP (4) Activate eBGP peering between R2 and R3 using their global IPv6 addresses (config-router)#neighbor <peer’s global IPv6 address> remote-as <AS number> (config-router)#neighbor <peer’s global IPv6 address> (config-router)#address-family ipv6 (config-router-af)#neighbor <peer’s global IPv6 address> activate (config-router-af)#end Look at the BGP routing table to determine if you received BGP routes from your neighbor #show bgp ipv6 unicast summary #show bgp ipv6 unicast neighbors <IP address> advertised-routes #show bgp ipv6 unicast neighbors <IP address> routes #show ipv6 route bgp TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 95
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Lab 5: Routing
with BGP (5) Task: Filtering BGP Routes On R2 and R3, filter the unique-local prefix (fc00::/10) so that you do not receive them from the peers (config)#ipv6 prefix-list lab5 deny fc00::/10 le 128 (config)#ipv6 prefix-list lab5 permit ::/0 le 64 (config)#router bgp <your AS number> (config-router)#address-family ipv6 (config-router-af)#neighbor <peer’s global IPv6 address> prefix-list lab5 in (config-router-af)#exit On R1 and R4, verify that you do not receive any unique-local routes via BGP from the remote peer. Only the global IPv6 prefixes should be received. #clear bgp ipv6 unicast <peer AS number> in #show bgp ipv6 unicast #show bgp ipv6 unicast neighbors <IP address> advertised-routes #show bgp ipv6 unicast neighbors <IP address> routes #show ipv6 route bgp TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 96
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Lab 6: Manual
Tunneling in IPv6 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 97
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Lab 6: Task
Summary Disable IPv6 routing protocols on all routers Remove the IPv6 addresses on serial2/0 interface of R2 and R3 Configure IPv4 address on serial2/0 interface of R2 and R3, use 192.168.30.<router xx>/24 Configure tunnel interfaces on R2 and R3 and configure them for manual tunneling Enable RIPng on both tunnel endpoints and other relevant interfaces on all four routers Enable EIGRPv6 over the tunnel Enable mutual redistribution between EIGRPv6 and RIPng on R2 and R3 Use show commands to view the IPv6 routing table and tunnel interface statistics Use ping to verify IPv6 connectivity between H1 and H2 Answer review questions at the end of section 7 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 98
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Manual Tunnel Configuration
Example IPv6 IPv4 IPv6 Network A GRE Tunnel Network B E0/0 S1/1 F0/0 S1/0 S1/1 H1 H2 R1 S1/0 R2 R3 S1/0 R4 R1 S1/0 F0/0 E0/0 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 99
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Lab 6: Using
Tunnels (Manual-1) Task: Configuring the Tunnel First disable both OSPFv3 and BGP on all routers Remove the IPv6 address on Serial interface between R2 and R3 (config)#no ipv6 router ospf 1 (config)#no router bgp <your AS> (config)#interface Serialxx (config-if)#no ipv6 address (config-if)#no ipv6 enable Configure IPv4 address on interface between R2 and R3 (config)#interface xxx (config-if)#ip address 192.168.30.<router #> 255.255.255.0 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 100
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Lab 6: Using
Tunnels (Manual-2) Configure a tunnel interface using tunnel0 (config)#interface tunnel 0 Use an IPv6 unnumbered address from the S1/0 @R2, S1/1@R3 (config-if)#ipv6 unnumbered S1/0@R2 (S1/1@R3) Identify the source and destination address of the tunnel, followed by the tunnel mode (config-if)#tunnel source Serial1/0@R2 (S1/1@R3) (config-if)#tunnel destination <peer’s IPv4 address> (config-if)#tunnel mode gre ip Enable RIPng on all four routers (config)#ipv6 router rip lab (config-rtr)#redistribute connected Enable RIPng on Ethernet 0/0 and Ethernet 1/0 interfaces on R1 and R4, and Ethernet 1/0 interfaces on R2 and R3 (config-if)#ipv6 rip lab enable TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 101
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Lab 6: Using
Tunnels (Manual-3) Configure OSPFv3 on the routers R2 and R3 with a Router-ID (config)#ipv6 router ospf 1 (config-rtr)#router-id 192.168.30.xx (where xx is your router #) Enable OSPFv3 on tunnel interfaces on R2 and R3 (config)#interface tunnel 0 (config-if)#ipv6 ospf 1 are 0 Enable mutual redistribution on R2 and R3 between RIPng and OSPFv3 (config)#ipv6 router ospf 1 (config)#redistribute rip lab (config)#ipv6 router rip lab (config)#redistribute ospf 1 TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 102
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Lab 6: Using
Tunnels (Manual-4) Verify that RIPng updates are carried over the tunnel #show ipv6 route Look at Tunnel 0 debugs and statistics #debug tunnel #show interface tunnel 0 accounting Verify connectivity between R1 & R4 using the ping command #ping <global IPv6 address of Ethernet0/0 of peer> Verify connectivity between H1 and H2 using the ping command #ping <global IPv6 address of peer Host> TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 103
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Thank You TECRST-2300 14448_04_2008_c1
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Recommended Reading
Available Online at the Cisco Press TECRST-2300 14448_04_2008_c1 © 2008 Cisco Systems, Inc. All rights reserved. Cisco Public 105
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TECRST-2300 14448_04_2008_c1
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